122553515899 has 4 divisors (see below), whose sum is σ = 129762546264. Its totient is φ = 115344485536.

The previous prime is 122553515879. The next prime is 122553515911. The reversal of 122553515899 is 998515355221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 998515355221 = 23743 ⋅42055147.

It is a cyclic number.

It is not a de Polignac number, because 122553515899 - 2¹⁵ = 122553483131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122553515839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3604515157 + ... + 3604515190.

It is an arithmetic number, because the mean of its divisors is an integer number (32440636566).

Almost surely, 2^122553515899 is an apocalyptic number.

122553515899 is a deficient number, since it is larger than the sum of its proper divisors (7209030365).

122553515899 is an equidigital number, since it uses as much as digits as its factorization.

122553515899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7209030364.

The product of its digits is 4860000, while the sum is 55.

The spelling of 122553515899 in words is "one hundred twenty-two billion, five hundred fifty-three million, five hundred fifteen thousand, eight hundred ninety-nine".